<template>
    <div>
        <!-- 面包悄导航区域 -->
        <el-breadcrumb>
            <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        <el-breadcrumb>

            <!-- 卡片视图区域 -->
            <el-card>
                <el-alert title="添加商品信息" type="info"  show-icon :closable="false"></el-alert>
                <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                    <el-step title="基本信息"></el-step>
                    <el-step title="商品参数"></el-step>
                    <el-step title="商品属性"></el-step>
                    <el-step title="商品图片"></el-step>
                    <el-step title="商品内容"></el-step>
                    <el-step title="完成"></el-step>
                </el-steps>
                <el-form :data="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                    <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                        <el-tab-pane label="基本信息" name="0">
                            <el-form-item label="商品名称" prop="goods_name">
                                <el-input v-model="addForm.goods_name"></el-input>
                            </el-form-item>
                            <el-form-item label="商品价格" prop="goods_price">
                                <el-input v-model="addForm.goods_price" type="number"></el-input>
                            </el-form-item>
                            <el-form-item label="商品重量" prop="goods_weight">
                                <el-input v-model="addForm.goods_weight" type="number"></el-input>
                            </el-form-item>
                            <el-form-item label="商品数量" prop="goods_number">
                                <el-input v-model="addForm.goods_number" type="number"></el-input>
                            </el-form-item>

                            <el-form-item label="商品分类" prop="goods_cat">
                                <el-cascader
                                    v-model="addForm.goods_cat"
                                    expand-trigger="hover"
                                    :options="catelist"
                                    :props="cateProps"
                                    @change="handleChange"></el-cascader>
                            </el-form-item>
                        </el-tab-pane>
                        <el-tab-pane label="商品参数" name="1">
                            <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
                                <el-checkbox-group v-model="item.attr_vals">
                                    <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                                </el-checkbox-group>
                            </el-form-item>
                        </el-tab-pane>
                        <el-tab-pane label="商品属性" name="2">
                            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                                <el-input v-model="item.attr_vals"></el-input>
                            </el-form-item>
                        </el-tab-pane>
                        <el-tab-pane label="商品图片" name="3">
                            <el-upload
                                :action="uploadUrl"
                                :on-preview="handlePreview"
                                :on-remove="handleRemove"
                                :file-list="fileList"
                                :headers="headerObj"
                                :on-success="handleSuccess"
                                list-type="picture">
                                <el-button size="small" type="primary">点击上传</el-button>
                                </el-upload>
                        </el-tab-pane>
                        <el-tab-pane label="商品内容" name="4">
                            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                            <el-button type="primary" class="btnAdd"></el-button>
                        </el-tab-pane>
                    </el-tabs>
                </el-form>
            </el-card>

            <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
                <img src="previewPath" alt="" class="previewImg">
            </el-dialog>
    </div>

</template>

<script>
import _ from lodash
export default {
    data(){
        return {
            activeIndex:'0',
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:[],
                pics:[],
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[
                    {required:true,message:'',tigger:'blur'}
                ],
                goods_price:[
                    {required:true,message:'',tigger:'blur'}
                ],
                goods_weight:[
                    {required:true,message:'',tigger:'blur'}
                ],
                goods_number:[
                    {required:true,message:'',tigger:'blur'}
                ],
                goods_cat:[
                    {required:true,message:'',tigger:'blur'}
                ]
            },
            catelist:[],
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            //动态参数列表数据
            manyTableData:[],
            //静态属性列表数据
            onlyTableData:[],
            uploadUrl :'http://localhost:8888/api/private/v1/upload',
            //图片上传组件的headers
            headerObj:{
                Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:'',
            previewVisible:false,
        }
    },
    created(){
        this.getCateList()
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length == 3){
                return this.addForm.goods_cat[2]
            }
            return ''
        }
    },
    methods:{
        //获取商品分类数据
        async getCateList(){
            const {data:res} = await this.$http.get('categories')
            if(res.meta.status != 200){
                return this.$message.error('获取商品分类失败')
            }
            this.catelist  = res.data;
        },
        //级联选择器选中项变化
        handleChange(){
            console.log(this.addForm.goods_cat)
            if(this.addForm.goods_cat.length != 3){
                this.addForm.goods_cat = []
            }
        },
        beforeTabLeave(activeName,oldActiveName){
            console.log(activeName,oldActiveName)
            if(this.addForm.goods_cat.length != 3){
                this.$message.error('请选择商品分类')
                return false
            }
        },
        async tabClicked(){
            //访问的动态参数面板
           if(this.activeIndex == '1'){
             const {data:res} = await  this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
             if(res.meta.status != 200){
                return this.$message.error('获取商品动态参数失败')
            }
            res.data.forEach(item=>{
               items.attr_vals = items.attr_vals.length == 0 ? [] : items.attr_vals.split(' ')
            })
            this.manyTableData = res.data
           }else if(this.activeIndex == '2'){
               const {data:res} = await  this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                if(res.meta.status != 200){
                    return this.$message.error('获取商品属性参数失败')
                }
                this.onlyTableData = res.data
           }
        },
        //预览图片
        handlePreview(file){
            this.previewPath = file.response.data.url
            this.previewVisible = true;
        },
        //处理移除图片的操作
        handleRemove(file){
            const file_path = file.response.data.tmp_path;
            const i = this.addForm.pics.findIndex(x=>{
                x.pic == file_path
            })
            this.addForm.pics.splice(i,1);
        },
        handleSuccess(response){
            this.addForm.pics.push({pic:response.data.tmp_path})
        },
        add(){
            this.$refs.addFormRef.validate(valid=>{
                if(!valid){
                    return this.$message.error('请填写必须的表单项')
                }

               const form = _.cloneDeep(this.addForm)
                //执行添加的业务逻辑
                form.goods_cat = form.goods_cat.join(',');
                this.manyTableData.forEach(item=>{
                    const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')};
                    this.addForm.attrs.push(newInfo)
                })
                this.onlyTableData.forEach(item=>{
                    const newInfo = {attr_id:item.attr_id,attr_value:item.attr_vals};
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs  = this.addForm.attrs

                //发超请求添加商品
                //商品名称唯一
                 const {data:res} = await this.$http.post('goods',form)
                 if(res.meta.status != 201){
                    return this.$message.error('添加商品失败')
                }
                this.message.success('添加商品成功')
                this.$router.push('/goods')
            })
        }
    }
}
</script>
<style lang="less" scoped>
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>